CN219220904U

CN219220904U - Double-acting buffer oil cylinder

Info

Publication number: CN219220904U
Application number: CN202320140076.9U
Authority: CN
Inventors: 徐敏
Original assignee: Wuxi Hengli Hydraulic Pneumatic Co ltd
Current assignee: Wuxi Hengli Hydraulic Pneumatic Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-06-20
Anticipated expiration: 2033-01-30

Abstract

The application discloses double-acting buffering hydro-cylinder, it includes the cylinder, the cylinder cap, piston rod and piston piece, the cylinder cap sets up in the both ends of cylinder, the piston piece is connected in the one end of piston rod, the piston piece slides and sets up in the cylinder, the piston rod runs through the cylinder cap and rather than sliding connection, cylinder length direction's both ends all intercommunication are connected with into oil pipe, still include buffer unit, buffer unit respectively is provided with a set of at cylinder length direction's both ends, buffer unit includes the connection plectane, buffer ring and first spring, connect the plectane and be connected with the cylinder, buffer ring sets up in the one side of connecting the plectane and deviating from the cylinder cap, first spring coupling is between connection plectane and buffer ring, piston piece opposite both ends are the frustum form, the inclined plane and the buffer ring butt of piston piece. The hydraulic cylinder has the effect of reducing the possibility of damage to the hydraulic cylinder.

Description

Double-acting buffer oil cylinder

Technical Field

The application relates to the technical field of hydraulic cylinders, in particular to a double-acting buffer cylinder.

Background

The hydraulic cylinder is a hydraulic actuating element which can convert hydraulic energy into mechanical energy and can do reciprocating linear motion. The hydraulic cylinder has simple structure, reliable operation and stable movement, so the hydraulic cylinder is widely applied to hydraulic systems of various machines. The output force of the hydraulic cylinder is related to the effective area of the piston and the pressure difference across the piston. The hydraulic cylinders have various structural forms, and can be divided into a linear reciprocating type and a rotary swing type according to a movement mode, and a single acting type and a double acting type according to a hydraulic pressure action condition.

Currently, common hydraulic cylinders include cylinder barrels, cylinder heads, pistons, piston rods, sealing devices, and exhaust devices. The piston slides and sets up in the cylinder, and the piston rod sets up in the cylinder, and the one end and the piston of piston rod are connected, and the one end of piston rod runs through the cylinder cap and with sliding fit.

In view of the above-mentioned related art, the inventor considers that when the piston moves towards two ends of the cylinder barrel in the length direction in the current use process, the speed of the piston rod cannot be reduced suddenly under the action of inertia, so that the piston and the cylinder cover can collide, and the end cover of the hydraulic cylinder can be damaged while generating larger noise.

Disclosure of Invention

To reduce the likelihood of damage to the hydraulic cylinder, the present application provides a double acting cushion cylinder.

The application provides a double-acting buffer cylinder adopts following technical scheme:

the utility model provides a double-acting buffering hydro-cylinder, includes cylinder, cylinder cap, piston rod and piston piece, the cylinder cap set up in the both ends of cylinder, the piston piece connect in the one end of piston rod, the piston piece slip set up in the cylinder, the piston rod run through the cylinder cap and rather than sliding connection, the equal intercommunication in cylinder length direction's both ends are connected with the oil feed pipe, its characterized in that: the cylinder barrel is characterized by further comprising a buffer assembly, wherein a group of buffer assemblies are respectively arranged at two ends of the inner length direction of the cylinder barrel, each buffer assembly comprises a connecting circular plate, a buffer ring and a first spring, the connecting circular plate is connected with the cylinder barrel, the buffer rings are arranged on one sides of the connecting circular plates, which deviate from the cylinder cover, the first springs are connected between the connecting circular plates and the buffer rings, two opposite ends of each piston block are in a frustum shape, and the inclined surfaces of the piston blocks are in butt joint with the buffer rings.

Through adopting above-mentioned technical scheme, when the piston piece is moved to cylinder length direction's tip fast under inertial effect, the inclined plane and the buffer ring butt of piston piece, first spring is along with the removal deformation accumulation elastic potential energy of piston piece, has realized buffering its removal, has reduced the impaired possibility of cylinder and cylinder cap. Through the mutually supporting of cylinder, cylinder cap, piston piece and buffer module, realized buffering the quick travel of piston piece, have the effect that reduces the damaged possibility of pneumatic cylinder.

Optionally, the buffer assembly further comprises a wedge block and a connecting rod, the wedge block is connected with the inner annular wall of the buffer ring through the connecting rod, two ends of the connecting rod are rotationally connected with the buffer ring and the wedge block, and the inclined plane of the wedge block is correspondingly arranged with the inclined plane of the piston block.

Through adopting above-mentioned technical scheme, the wedge is connected with the buffer ring through the connecting rod, and the inclined plane of wedge and the inclined plane butt of piston have increased the area of contact of piston and buffer assembly, help going on of buffering process.

Optionally, a connecting blind hole is formed at one end of the buffer ring, which is close to the connecting circular plate, and one end of the first spring is positioned in the connecting blind hole and connected with the bottom of the connecting blind hole.

Through adopting above-mentioned technical scheme, the setting of connecting the blind hole leads the removal of first spring, has improved the stability of buffer ring removal process.

Optionally, a dovetail groove is formed in the inner annular wall of the buffer ring, the length direction of the dovetail groove is parallel to the central axis direction of the buffer ring, a dovetail block is slidably connected in the dovetail groove, and the dovetail block is rotationally connected with one end of the connecting rod.

Through adopting above-mentioned technical scheme, when buffering the piston piece, the forked tail piece slides along its length direction in the forked tail groove, provides the position allowance for the removal of piston piece, has prolonged the stroke length of piston piece in the cylinder under the prerequisite that does not influence the buffering effect to the piston piece.

Optionally, an anti-wear layer is disposed on the inclined surface of the wedge block.

By adopting the technical scheme, the friction of the piston block to the wedge block is reduced due to the arrangement of the wear-resistant layer, and the service life of the device is prolonged.

Optionally, a connection ring groove is formed in the outer annular wall of the piston block along the circumferential direction, a sealing ring is embedded in the connection ring groove, and the sealing ring is abutted to the inner wall of the cylinder barrel.

Through adopting above-mentioned technical scheme, the clearance between piston block and the cylinder inner wall has been reduced in the setting of sealing washer, has reduced the possibility that takes place hydraulic oil and reveal.

Optionally, a second spring is arranged in the dovetail groove along the length direction of the dovetail groove, one end of the second spring is connected with the dovetail block, and the other end of the second spring is connected with the side wall, close to the connecting circular plate, of the dovetail groove.

Through adopting above-mentioned technical scheme, when the dovetail slides in the dovetail, the second spring deformation is accumulated and is accumulated elastic potential energy and produce the buffering to dovetail and wedge, has further improved the device buffering effect.

Optionally, the outer annular wall of the buffer ring is rotationally embedded with balls, and the balls are abutted with the inner wall of the cylinder barrel.

Through adopting above-mentioned technical scheme, the setting of ball has reduced the sliding friction force between buffer ring and the cylinder inner wall, helps the buffer ring to slide more smoothly in the cylinder.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the mutual matching of the cylinder barrel, the cylinder cover, the piston block and the buffer component, the rapid movement of the piston block is buffered, and the hydraulic cylinder damage possibility is reduced;

2. the wedge-shaped block increases the contact area between the piston block and the buffer assembly, thereby being beneficial to the buffer process;

3. the arrangement of the balls reduces the sliding friction force between the buffer ring and the inner wall of the cylinder barrel, and is beneficial to the buffer ring to slide in the cylinder barrel more smoothly.

Drawings

Fig. 1 is a schematic structural diagram of a dual-acting cushion cylinder according to an embodiment of the present application.

Fig. 2 is a partial cross-sectional view for embodying the internal structure of the cylinder tube in the embodiment of the present application.

Fig. 3 is an enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic diagram of a structure used to embody a cushioning assembly in an embodiment of the present application.

Reference numerals illustrate: 1. a cylinder; 2. a cylinder cover; 3. a piston rod; 4. a piston block; 5. a buffer assembly; 51. a connecting circular plate; 52. a buffer ring; 53. a first spring; 54. wedge blocks; 55. a dovetail groove; 56. dovetail blocks; 57. a connecting rod; 58. a second spring; 6. an oil inlet pipe; 7. a connecting bolt; 8. a ball; 9. connecting the blind holes; 10. an abrasion-proof layer; 11. a connecting ring groove; 12. and (3) sealing rings.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4. The embodiment of the application provides a double-acting buffer oil cylinder, which has the effect of reducing the possibility of damage of a hydraulic cylinder.

Referring to fig. 1 and 2, a double-acting cushion cylinder includes a cylinder tube 1, a cylinder head 2, a piston rod 3, a piston block 4, and a cushion assembly 5. The piston block 4 is connected to one end of the piston rod 3, the cylinder cover 2 is respectively provided with one at the openings at two ends of the cylinder barrel 1, and the piston block 4 is slidably arranged in the cylinder barrel 1. Opposite ends of the piston block 4 are arranged in a truncated cone shape, and the diameter of the middle position of the piston block 4 is equal to the inner diameter of the cylinder barrel 1. Both ends of the cylinder barrel 1 in the length direction are communicated and connected with an oil inlet pipe 6.

Referring to fig. 2 and 3, the damper assembly 5 is provided with a set of damper assemblies 5 at both ends in the longitudinal direction of the inside of the cylinder tube 1, and the damper assembly 5 includes a connection circular plate 51, a damper ring 52, a first spring 53, and a wedge block 54. The connection disc 51 is provided inside the cylinder 1, and the connection disc 51 and the cylinder 1 are connected by a connection bolt 7. The buffer ring 52 is arranged on one side of the connecting circular plate 51, which is away from the cylinder cover 2, the central shaft of the buffer ring 52 is overlapped with the central shaft of the cylinder barrel 1, a plurality of balls 8 for reducing friction are rotatably connected to the outer annular wall of the buffer ring 52, and the balls 8 are abutted with the inner wall of the cylinder barrel 1. The first spring 53 is disposed between the buffer ring 52 and the connection circular plate 51, a connection blind hole 9 is formed on one side of the buffer ring 52, which is close to the connection circular plate 51, one end of the first spring 53 is fixedly connected with the connection circular plate 51, and the other end is connected with the bottom wall of the connection blind hole 9.

Referring to fig. 3 and 4, two wedge blocks 54 are provided inside the buffer ring 52, inclined surfaces of the wedge blocks 54 are provided corresponding to inclined surfaces of the piston block 4, and the anti-wear layer 10 is fixedly connected to the inclined surfaces of the wedge blocks 54. Two dovetail grooves 55 are formed in the inner annular wall of the buffer ring 52 along the central axis direction of the buffer ring 52, and the two dovetail grooves 55 are arranged in one-to-one correspondence with the two wedge blocks 54. Each dovetail groove 55 is slidably connected with a dovetail block 56, the dovetail blocks 56 are connected with the wedge blocks 54 through connecting rods 57, and two ends of each connecting rod 57 are rotatably connected with the dovetail blocks 56 and the wedge blocks 54. The second spring 58 is disposed in the dovetail groove 55 along the length direction thereof, one end of the second spring 58 is fixedly connected with the dovetail block 56, the other end is fixedly connected with the inner wall of the dovetail groove 55, which is close to the connecting circular plate 51, and in a natural state, the dovetail block 56 is abutted against the inner wall of the dovetail groove 55 under the action of the second spring 58.

Referring to fig. 2 to 4, the piston block 4 slides along the length direction of the cylinder 1, when the piston block 4 moves to a position close to the end of the cylinder 1 under the action of inertia, the conical table surface of the piston block 4 abuts against the wear-resistant layer 10 of the wedge block 54, the dovetail block 56 slides in the dovetail groove 55, and the second spring 58 deforms to accumulate elastic potential energy. The first spring 53 deforms and accumulates elastic potential energy at the same time, and plays a role in buffering sliding of the piston block 4 in the cylinder tube 1. The provision of the wear layer 10 reduces the sliding friction between the wedge block 54 and the piston block 4, helping to extend the service life of the device. The arrangement of the dovetail block 56 and the dovetail groove 55 provides a position allowance for the movement of the piston block 4 in the cylinder 1, and the arrangement of the connecting blind hole 9 realizes the limiting and guiding of the first spring 53.

Referring to fig. 3, a connecting ring groove 11 is formed in the outer circumferential wall of the piston block 4 along the circumferential direction, and a seal ring 12 is fitted in the connecting ring groove 11, and the seal ring 12 abuts against the inner circumferential wall of the cylinder tube 1. The arrangement of the connecting ring groove 11 realizes the detachable connection between the sealing ring 12 and the piston block 4, and the arrangement of the sealing ring 12 reduces the possibility of liquid leakage on two sides of the piston block 4.

The implementation principle of the double-acting buffer oil cylinder in the embodiment of the application is as follows: the piston block 4 slides along the length direction of the cylinder 1, when the piston block 4 moves to a position close to the end of the cylinder 1 under the action of inertia, the conical table surface of the piston block 4 is abutted with the wear-resistant layer 10 of the wedge block 54, the dovetail block 56 slides in the dovetail groove 55, and the second spring 58 deforms to accumulate elastic potential energy. The first spring 53 deforms and accumulates elastic potential energy at the same time, and plays a role in buffering sliding of the piston block 4 in the cylinder tube 1. The provision of the wear layer 10 reduces the sliding friction between the wedge block 54 and the piston block 4, helping to extend the service life of the device.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a double-acting buffering hydro-cylinder, includes cylinder (1), cylinder cap (2), piston rod (3) and piston piece (4), cylinder cap (2) set up in the both ends of cylinder (1), piston piece (4) connect in the one end of piston rod (3), piston piece (4) slip set up in cylinder (1), piston rod (3) run through cylinder cap (2) and rather than sliding connection, the equal intercommunication in both ends of cylinder (1) length direction is connected with oil feed pipe (6), its characterized in that: still include buffer unit (5), buffer unit (5) are in each be provided with a set of at cylinder (1) inner length direction's both ends, buffer unit (5) are including connecting plectane (51), buffer ring (52) and first spring (53), connect plectane (51) with cylinder (1) are connected, buffer ring (52) set up in connect plectane (51) deviate from one side of cylinder cap (2), first spring (53) connect in connect plectane (51) and between buffer ring (52), the both ends that piston block (4) are opposite are frustum form, the inclined plane of piston block (4) with buffer ring (52) butt.

2. A double acting cushion cylinder according to claim 1, wherein: the buffer assembly (5) further comprises a wedge block (54) and a connecting rod (57), the wedge block (54) is connected with the inner annular wall of the buffer ring (52) through the connecting rod (57), two ends of the connecting rod (57) are rotationally connected with the buffer ring (52) and the wedge block (54), and the inclined plane of the wedge block (54) is correspondingly arranged with the inclined plane of the piston block (4).

3. A double acting cushion cylinder according to claim 2, wherein: one end of the buffer ring (52) close to the connecting circular plate (51) is provided with a connecting blind hole (9), and one end of the first spring (53) is positioned in the connecting blind hole (9) and is connected with the bottom of the connecting blind hole (9).

4. A double acting cushion cylinder according to claim 3, wherein: the inner annular wall of the buffer ring (52) is provided with a dovetail groove (55), the length direction of the dovetail groove (55) is parallel to the central axis direction of the buffer ring (52), a dovetail block (56) is connected in the dovetail groove (55) in a sliding manner, and the dovetail block (56) is rotationally connected with one end of the connecting rod (57).

5. A double acting cushion cylinder as claimed in claim 4 wherein: an anti-wear layer (10) is arranged on the inclined surface of the wedge-shaped block (54).

6. A double acting cushion cylinder as defined in claim 5 wherein: the piston block is characterized in that a connecting ring groove (11) is formed in the outer annular wall of the piston block (4) along the circumferential direction, a sealing ring (12) is embedded in the connecting ring groove (11), and the sealing ring (12) is abutted to the inner wall of the cylinder barrel (1).

7. A double acting cushion cylinder as claimed in claim 4 wherein: a second spring (58) is arranged in the dovetail groove (55) along the length direction of the dovetail groove, one end of the second spring (58) is connected with the dovetail block (56), and the other end of the second spring is connected with the side wall, close to the connecting circular plate (51), of the dovetail groove (55).

8. The double acting cushion cylinder of claim 7, wherein: the outer annular wall of the buffer ring (52) is rotationally embedded with balls (8), and the balls (8) are abutted with the inner wall of the cylinder barrel (1).